"I've got to become an independent," Scarborough said Tuesday during an interview with CBS "Late Show" host Stephen Colbert.

He appeared as a guest with his "Morning Joe" co-host and fiance, Mika Brzezinski, who recently was attacked in sharply personal terms by the president.

Mika Brzezinski Calls Trump Tweet ‘Unbelievably Alarming'

Mika Brzezinski, co-host of MSNBC’s “Morning Joe” spoke out a day after President Donald Trump attacked her and Joe Scarborough on Twitter. Brzezinski said Trump's insult followed a joke she made on her show about the fake Time magazine cover that was reported to be hanging in at least four of Trump’s golf clubs. "It is unbelievably alarming that this president is so easily played…by a cable news host. What is that saying to our allies, to our enemies?" Brzezinski said.

(Published Friday, June 30, 2017)

Scarborough said it's inexplicable why so many Republicans look the other way when Trump says or does something that betrays the party's core values.

"I am a Republican but I'm not going to be a Republican anymore," Scarborough told Colbert.